Mijn macbook pro start niet meer op! Eerst bleef hij hangen op het grijze scherm. Na gebruik van schijfhulp programma, heb ik teruggezet via timemachine. Maar nu krijg ik: panic (cpu 0 caller 0xffffff80005418bdf) .... zie afbeelding...
Back up all data, if you haven't already done so. There are ways to back up a computer that won't boot. If you need help, ask.
Boot into Recovery by holding down the key combination command-R at the startup chime. Release the keys when you see a gray screen with a spinning dial.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.
When the OS X Utilities screen appears, follow the prompts to reinstall the OS. You don't need to erase the boot volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade, so make a note of those before you begin.